Screenshots aren't 100% proof but they are a lot better than just quoting the message. If you can include a screenshot of the email, with the subject title / to and from email addresses, it might help your case (emphasis on might).
That's why I wrote that I can grab a video, but admins do know that it is legit.
And as I have a newbie account I can not attach photos (as far as I know).
upd screenshot 